Learn Python The Hard Way学习(八) - 打印，还是打印

Learn Python The Hard Way学习(8) - 打印，还是打印
formatter = "%r %r %r %r"print formatter % (1, 2, 3, 4)print formatter % ("one", "two", "three", "four")print formatter % (True, False, False, True)print formatter % (formatter, formatter, formatter, formatter)print formatter % ( "I had this thing.", "That you could type up right.", "But it didn't sing.", "So I said goodnight.")

运行结果1 2 3 4'one' 'two' 'three' 'four'True False False True'%r %r %r %r' '%r %r %r %r' '%r %r %r %r' '%r %r %r %r''I had this thing.' 'That you could type up right.' "But it didn't sing." 'So I said goodnight.'
加分练习1. 检查并记录自己的错误。2. 注意最后一行，既有单引号又有双引号，它们是怎么工作的？默认使用单引号，如果字符串中有单引号就使用双引号。如果字符串中有双引号，还是默认使用单引号。